Good News:The v3.2.8 release is by far the most stable VirtualBox release I have tried.It fixed the vast majority of v3.1.0 bugs, and the overall stability feel has improved very much.If you compare the two spread sheets, you see much more Green Color in v3.2.8 as compared to the previous Multi Color release (v3.1.0).

Bad News:

1. 3D Acceleration is a biggest problem for now;---------------------a. openSUSE/KDE3: Running "glxgears" on openSUSE guests makes them run at 500 fps, which is a "software rendering" performance. Bug #7531b. openSUSE/KDE4: I have tried to activate KDE4 kwin desktop compositing, but this failed, resetting to 2D mode. How to debug? Bug #7531, Bug #4582c. Red Hat/GNOME: Tried to activate Compiz from GNOME menu, but this failed, resetting to 2D mode. How to debug? Bug #7531Good news: RHEL 6.0 Final Release fixes the problems with 3D -- and Compiz under GNOME now works fine. (unlike BETA)d. Windows Vista/ XP x64 3D fail -- Bug #7066FIXED in 4.0.0

Technologov: Great work, very comprehensive. I am wondering if the table can be recreated in the virtualbox wiki using restructured text? This might be a good place for people to collaborate on updating it as things change. I couldn't find any software to do it automatically (although twiki has a plugin to import excel spreadsheets). I don't really know enough about restructured text (I know it can do tables) but it must be possible, no?

Yeah you seem to be right! It is a trac wiki as far as I can tell and I have a login on the virtualbox site but I don't think it actually allows me to do anything. Going from the howtos page in the user docs it seems that one has to email the user mailing list to get something added to the trac wiki documentation pages.

Another option I guess is to use one of the free wiki sites to create a wiki specifically about compatibility of the different versions. Maybe wikispaces or perhaps even better wikia which is mediawiki based?

1) SMP unusable on RH EL4/Centos 4 guests (os detects 2nd CPU as having 0 'bogomips') due to speed issues -- runs very slow2) RH EL4/Centos 4 very slow in general even using 1 cpu. CPU/hdd intensive operations like a DB query to a LOCAL database (not even networked) run about 5% normal speed (yes FIVE percent) with guest OS cpu usage maxed @ 100%.3) SATA is completely nonfunctional for a RH EL4/Centos 4 guest.

(I have had bugs opened for the above for weeks, so far they have been completely ignored)

Great job . I'd *_really*_ like to see the reverse tests as well -- Linux hosts of various types (Ubuntu, Fedora, CentOS, openSUSE) hosting for various Windows and *nix guests just to see what makes the best platform on which to run VirtualBox .

Installing a lot of different _host OSes_ is too time consuming, because I can't parallelize this job on my PC.

If I had a lab with 4 identical PCs, I could make it happen.

IMO - the best platform to run on, is the one *you* know best. This will save much more time than actual performance differences.(example: on DOS computer with 486 CPU *I work* much faster than on an i-phone that has more powerful CPU)